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Description Tabs

Poudrette Quarry, Mont Saint-Hilaire, Québec, Canada
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
0.8 × 1 × 1.6 cm

This is not some obscure copper mineral. It is just a small sample of ferroceladonite on siderite on microcline. The brown stuff is an amorphous coating – more or less present in almost all cavities at MSH. Visual ID by Dr. A. Lalonde (but no analysis).

Ferroceladonite is an uncommon mineral, having been reported only from MSH and eight other localities (per Mindat). At MSH, when found, it often covers everything as a thin coating and can be locally abundant. But it is not found very often. In this case it consists of tiny botryoidal aggregates. You will need 15X to view them.

Single item shipping weight 1.9 oz. Note that USPS foreign packet rates recently increased significantly. It may be advantageous for foreign customers to hold an "open box" so as to reduce postage costs by combining with items from a future auction. Let me know, and I will generate a new “item only” invoice. Postage will be invoiced when all items are actually shipped.

Outside the USA, the stated postage and packing rate applies up to a total weight of 8 oz (225 g).

Within the USA, there is a nominal increase of $0.20 for each additional ounce. Above 13 oz, I will use Priority Mail. Up to 16 oz, the “own box” Priority rate is $8.50 (including packing).

Please see my "Shipping Policy" for details. 

Mineral Data
What's on the rock


Crystal System: 
2.0 - 2.5
Type Locality: 
Hokonui Hills, South Island, New Zealand
LMB minerals

Seller Information

Payment options: offline, paypal_wpp, paypal_wps

Seller's terms and conditions

In addition to the standard terms and conditions, please note the following. Almost all IDs are visual. While in most cases the ID is obvious, there may be cases where it is not. If you are doubtful about a particular ID, please ask for more information. Or do not bid! Similarly, if you are not sure that the specimen meets your criteria, do not bid. I have tdone the best I can with the photos. Nevertheless, if you are not happy with a specimen for any reason, I will refund the bid price – but not the shipping costs (unless the fault is clearly mine) – if the specimen is returned. This policy applies even if analysis of the specimen shows that my ID was incorrect. When in doubt, ask - or don’t bid. Note that most crystals at MSH and Varennes are micros - even if on large specimens. Please pay attention to the stated sizes. Any customs duties, fees etc. are the responsibility of the buyer.

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